Referral Contests 2 by Siropu

Премиум Плагин 2.х.х Referral Contests 2 by Siropu 2.1.9

This release fixes some permission issues with sending/creating invitations.
This release fixes some compatibility issues with XF 2.1.0

NOTE: This release is for XenForo 2.1.x. Do not try to upgrade to this version if you are running XenForo 2.0.x
Referrer error when trying to apply reward.
Referrer account deletion resulting in an empty referrer field for the referral profile.
Other code issues.

Later today there will be a XF 2.1 update.
Referrer field issue with unconfirmed users, setting referrer twice.
Admin user editing issue with referrer field.
Added user option (permission based) to create invitations manually.
Added "Invitations per month" user group permission.
Users with unconfirmed accounts won't count as referrals until they confirm their account.
When creating invitations as admin for a different user, that user will get an alert about it.

Bugs Fixed
Integration issue with DB Tech Credits latest version.
Issue with sending invitations in some situations.
Issue with sending admin alerts when a referred user required moderator approval.
Uninstalling not removing custom user field.
Other code issues.